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When hard water is evaporated completely...

When hard water is evaporated completely , the white and solid remains in the container . It may be due to the presence of
1 . Carbonates of Ca and Mg
2 . Sulphate of Ca and Mg
3 . Chlorides of Ca and Mg
Select the correct answer using the cods given below :

A

1 and 2 only

B

1 , 2 and 3

C

3 only

D

1 and 3 only

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